The effect of the reactor length was evaluated from 50 to 150 cm (250–750 μL) and the best results were achieved with the 100-cm long one, which provides a sample residence time of ca. 20 s. While the shortest reactor was not effective for analyte extraction, the longest one caused a signal diminution (ca. 23%) due to dispersion effects. A two-fold higher analytical signal was obtained by reducing the pulse frequency of the carrier from 5 Hz to 1 Hz during the transport of the sample zone to the coiled reactor. This is due to the higher sample residence time and the more effective heating of the sample zone in the heated reactor. After attaining the signal maximum, the increase of the frequency to 2 Hz and the diminution of the Triton X-114 concentration due to dispersion in the carrier were effective to remove the SRP from the cell without requiring an eluent solution. The feasibility of solenoid micro-pumps to change the pulse frequency and the higher heating efficiency due to the better radial mixing provided by pulsed flows [25] were then exploited to improve CPE efficiency.